\n In-depth analysis of waterproof coating glue<\/p<\/p>\n
\n There are many ways to classify waterproof coating glue. The main categories according to chemical structure are: <\/p<\/p>\n
\n 1. Polyacrylate (PA); <\/p<\/p>\n
\n 2. Polyurethane (PU);<\/p<\/p>\n
\n 3. Polyvinyl chloride (PVC);<\/p<\/p>\n
\n 4. Silicone;<\/p<\/p>\n
\n \t5.\u5408\u6210\u6a61\u80f6\u7c7b(\u5982\u6c2f\u4e01\u6a61\u80f6)\u3002<\/p>\n
\n <\/p<\/p>\n
\n Compared with the solvent type, the water-based type is non-toxic, non-flammable, safe, low-cost and does not require recycling. It can produce thick-coated products, which is conducive to the production of colored coating products. The coating has good hydrophilicity; its disadvantage is low water pressure resistance. Slow drying and difficult to adhere to filament fabrics \ufffd\u6309\u6d82\u5c42\u5de5\u827a\u53ca\u7119\u70d8\u6761\u4ef6\u4e0d\u540c\u53c8\u6709\u5e72\u5f0f\u6d82\u5c42\u80f6\u548c\u6e7f\u5f0f\u6d82\u5c42\u80f6\uff0c\u4f4e\u6e29\u4ea4\u8054\u6d82\u5c42\u80f6\u548c\u9ad8\u6e29\u4ea4\u8054\u6d82\u5c42\u80f6\u4e4b\u5206\ufffd \ufffd\u6b64\u5916\uff0c\u8fd8\u6709\u805a\u56db\u6c1f\u4e59\u70ef\u3001\u805a\u9170\u6c28\u3001\u805a\u916f\u3001\u805a\u4e59\u70ef\u3001\u805a\u4e19\u70ef\u548c\u86cb\u767d\u8d28\u7c7b\ufffd \ufffd\u76ee\u524d\u4e3b\u8981\u5e94\u7528\u7684\u662f\u805a\u4e19\u70ef\u9178\u916f\u7c7b\u548c\u805a\u6c28\u916f\u7c7b\ufffd According to the medium used, it is divided into two types: solvent type and water type. The solvent type has the advantages of high water pressure resistance, good film-forming properties, fast drying, and low solid content, but at the same time it has permeability on fabrics. It has the disadvantages of being strong, feeling rough and hard, highly toxic, easy to catch fire, requiring solvent recovery equipment and high recycling costs. \ufffd\u5e72\u5f0f\u548c\u4f4e\u6e29\u4ea4\u8054\u6d82\u5c42\u80f6\u56e0\u5176\u6d82\u5c42\u5de5\u827a\u7b80\u5355\uff0c\u7119\u70d8\u6e29\u5ea6\u4f4e\uff0c\u7701\u529b\u8282\u80fd\uff0c\u5b83\u4eec\u662f\u672a\u6765\u6d82\u5c42\u7ec7\u7269\u53d1\u5c55\u7684\u8d8b\u52bf\ufffd \ufffd<\/p<\/p>\n
\n <\/p<\/p>\n
\n 1. Polyacrylate coating glue (Polyacrylate referred to as PA)<\/p<\/p>\n
\n Polyacrylate fabric coating glue is one of the commonly used coating glues at present. It has the following advantages: <\/p<\/p>\n
\n a. Good fastness to sunlight and weather, not easy to yellow; <\/p<\/p>\n
\n b. Good transparency and co-compatibility, which is beneficial to the production of colored coating products; <\/p<\/p>\n
\n c. Good washing resistance; <\/p<\/p>\n
\n d. Strong adhesion; <\/p<\/p>\n
\n \te\u3001\u6210\u672c\u8f83\u4f4e\u3002<\/p>\n
\n The disadvantages are: <\/p<\/p>\n
\n a. Poor elasticity and easy to wrinkle; <\/p<\/p>\n
\n b. Poor surface finish; <\/p<\/p>\n
\n \tc\u3001\u624b\u611f\u96be\u4ee5\u8c03\u8282\u9002\u5ea6\u3002<\/p>\n
\n \t\u521d\u7684\u805a\u4e19\u70ef\u9178\u916f\u7c7b\u6d82\u5c42\u80f6\u5c5e\u4e8e\u5355\u7eaf\u9632\u6c34\u578b\u4ea7\u54c1\uff0c\u901a\u8fc7\u51e0\u5341\u5e74\u7684\u53d1\u5c55\uff0c\u76ee\u524d\u7684\u54c1\u79cd\u4e0d\u4ec5\u5177\u6709\u9632\u6c34\u900f\u6e7f\uff0c\u963b\u71c3\u7b49\u591a\u79cd\u529f\u80fd\uff0c\u800c\u4e14\u8fd8\u6709\u4f4e\u6e29\u8282\u80fd\u7684\u7279\u8272\ufffd \ufffd\u805a\u4e19\u70ef\u9178\u916f\u7c7b\u6d82\u5c42\u80f6\u4e00\u822c\u5747\u7531\u786c\u7ec4\u5206\uff08\u5982\u805a\u4e19\u70ef\u9178\u7532\u916f\u7b49\uff09\u548c\u8f6f\u7ec4\u5206\uff08\u5982\u805a\u4e19\u70ef\u9178\u4e01\u916f\u7b49\uff09\u5171\u805a\u800c\u6210\ufffd The main monomers of polyacrylate coating include acrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate, etc. In order to improve its waterproof performance, acrylamide and acrylonitrile can be added when necessary. The polymerization initiator generally uses peroxide ( Such as potassium persulfate, etc.) \ufffd<\/p<\/p>\n
\n <\/p<\/p>\n
\n 1.1 Waterproof coating finishing agent<\/p<\/p>\n
\n \t\u6b64\u79cd\u805a\u4e19\u70ef\u9178\u916f\u7c7b\u6d82\u5c42\u6574\u7406\u5242\u521d\u591a\u4e3a\u6eb6\u5242\u578b\u4ea7\u54c1\uff0c\u5176\u7c98\u7740\u6027\u548c\u8010\u6c34\u6027\u6781\u4f73\u3002\u4e3a\u4e86\u63d0\u9ad8\u819c\u7684\u5f3a\u5ea6\uff0c\u5e38\u52a0\u5165\u5916\u80f6\u8054\u5242\u3002\u5176\u9002\u5408\u52a0\u5de5\u67d4\u8f6f\u7684\u8584\u7ec7\u7269\uff0c\u4e0e\u62fc\u7528\u4e00\u6b21\uff0c\u5373\u53ef\u83b7\u5f97\u8f83\u9ad8\u7684\u62d2\u6c34\u548c\u8010\u6c34\u538b\u6548\u679c\u3002\u4f46\u6eb6\u5242\u578b\u4ea7\u54c1\u542b\u6709\u5927\u91cf\u7684\u6709\u673a\u6eb6\u5242\u5982\u7532\u82ef\u3001\u918b\u9178\u4e59\u916f\u7b49\uff0c\u4f7f\u7528\u65f6\u5bb9\u6613\u9020\u6210\u73af\u5883\u6c61\u67d3\u6216\u53d1\u751f\u706b\u707e\uff0c\u4e14\u6eb6\u5242\u56de\u6536\u8d39\u7528\u9ad8\u3002\u6eb6\u5242\u578b\u6d82\u5c42\u6574\u7406\u5242\u5408\u6210\u65b9\u6cd5\u4e3b\u8981\u6709\u4e24\u79cd\uff0c\u4e00\u79cd\u662f\u60ac\u6d6e\u805a\u5408\uff0c\u6240\u5f97\u4ea7\u54c1\u7684\u5206\u5b50\u91cf\u8f83\u9ad8\uff1b\u53e6\u4e00\u79cd\u662f\u6eb6\u6db2\u805a\u5408\uff0c\u6240\u5f97\u4ea7\u54c1\u7684\u5206\u5b50\u91cf\u4f4e\u3002<\/p>\n
\n \t\u4e3a\u4e86\u514b\u670d\u6eb6\u5242\u578b\u4ea7\u54c1\u7684\u7f3a\u70b9\uff0c\u6c34\u7cfb\u578b\u7684\u805a\u4e19\u70ef\u9178\u916f\u7c7b\u6d82\u5c42\u6574\u7406\u5242\u5e94\u8fd0\u800c\u751f\ufffd \ufffd\u6c34\u7cfb\u578b\u7684\u53c8\u5206\u4e3a\u4e73\u6db2\u7c7b\uff0c\u975e\u7682\u4e73\u6db2\u7c7b\u548c\u6c34\u6eb6\u7c7b\u4e09\u79cd\ufffd \ufffd\u4e73\u6db2\u7c7b\u5206\u5b50\u91cf\u4e3a10-500\u4e07\uff0c\u7c92\u5b50\u76f4\u5f840.05-0.2\u5fae\u7c73\uff0c\u542b\u56fa\u91cf\u4e00\u822c\u4e3a40-60%\ufffd Due to the emulsion polymerization method, a small amount of compound emulsifier is added during polymerization. Due to the presence of the emulsifier, during the process of fusing and forming a film, part of it is squeezed to the interface between the film and the fabric, thus weakening the bonding strength with the fabric, making the The water pressure resistance of the product is affected to a certain extent \ufffd\u6c34\u6eb6\u7c7b\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u80f6\u4f53\u5206\u6563\u6db2\uff0c\u662f\u5728\u9ad8\u805a\u7269\u4e2d\u5f15\u5165\u4eb2\u6c34\u6027\u5b98\u80fd\u56e2\uff0c\u80fd\u5728\u6c34\u4e2d\u5448\u6f84\u6e05\u72b6\u6001\uff0c\u6c34\u6eb6\u7c7b\u7684\u5206\u5b50\u91cf\u4e00\u822c\u572810-20\u4e07\u5de6\u53f3\ufffd \ufffd\u53e6\u4e00\u90e8\u5206\u88ab\u6324\u81f3\u819c\u7684\u5916\u8868\u9762\uff0c\u5f15\u8d77\u819c\u8868\u9762\u7684\u6da9\u6ede\u611f\uff0c\u9020\u6210\u6d82\u5c42\u7ec7\u7269\u7684\u624b\u611f\u4e0d\u723d\ufffd \ufffd\u975e\u7682\u4e73\u6db2\u7c7b\uff08\u4e5f\u6709\u79f0\u65e0\u4e73\u5242\u578b\uff09\u6d82\u5c42\u5242\u4e0d\u542b\u4e73\u5316\u5242\uff0c\u5bf9\u7ec7\u7269\u4e3b\u8981\u8fdb\u884c\u7cbe\u7ec6\u6d82\u5c42\u9632\u6c34\u6574\u7406\ufffd \ufffd\u6574\u7406\u540e\u7684\u7ec7\u7269\u80fd\u4fdd\u6301\u539f\u6709\u7684\u98ce\u683c\uff0c\u5177\u6709\u67d4\u8f6f\u7684\u624b\u611f\u548c\u5f88\u9ad8\u7684\u7262\u5ea6\uff0c\u624b\u611f\u6ed1\u723d\uff0c\u6709\u8f83\u9ad8\u7684\u673a\u68b0\u6027\u80fd\u548c\u826f\u597d\u7684\u9632\u6c34\u6548\u679c\ufffd \ufffd<\/p<\/p>\n
\n It has been reported in China that polyacrylate ultrafine emulsion was synthesized by emulsion polymerization. Its average particle size is below 50nm and its appearance is translucent colloidal mucus. 2D resin was selected as the external linking agent and fluorine-containing resin was used for post-water-repellent finishing. Allows coated fabrics to achieve higher water pressure resistance and water repellency \ufffd\u76ee\u524d\u56fd\u5185\u8be5\u7c7b\u4ea7\u54c1\u591a\u4e3a\u5916\u4ea4\u8054\u578b\uff0c\u5e94\u7528\u65f6\u987b\u52a0\u5165\u4ea4\u8054\u5242\uff0c\u7ed9\u5382\u5bb6\u5e94\u7528\u5e26\u6765\u4e0d\u4fbf\ufffd \ufffd\u8fd1\u5e74\u56fd\u5185\u6709\u4eba\u5bf9\u6c34\u6027\u8d85\u5fae\u4e73\u81ea\u4ea4\u8054\u805a\u4e19\u70ef\u9178\u916f\u7ec7\u7269\u6d82\u5c42\u5242\u7684\u5e94\u7528\u6027\u80fd\u8fdb\u884c\u4e86\u7814\u7a76\uff0c\u7ed3\u679c\u8868\u660e\u5176\u6027\u80fd\u4f18\u5f02\uff0c\u5177\u6709\u5e7f\u9614\u7684\u5e94\u7528\u524d\u666f\ufffd \ufffd<\/p<\/p>\n
\n <\/p<\/p>\n
\n 1.2 Waterproof and breathable coating finishing agent<\/p<\/p>\n
\n \t\u7ecf\u6b64\u7c7b\u6d82\u5c42\u5242\u6574\u7406\u8fc7The fabric has both waterproof and moisture-permeable functions. Its waterproof and moisture-permeable mechanism relies on the formation of a large number of micropores during film formation. These pores are smaller than 2 microns, which can block water droplets (average diameter 100 microns), but allow water vapor molecules (average diameter 0.0004 microns) to pass through, thereby achieving waterproof and breathable properties. In order to improve the breathability and moisture permeability of polyacrylate processed fabrics, since the 1980s, Japan has dissolved acrylate copolymers containing hydrophilic groups such as carboxyl, hydroxyl, and nitrile groups in water-miscible organic solvents. The coating glue is made from the coating glue. After coating, it is treated with warm water to remove the solvent and solidify the copolymer. It is dried and dehydrated to form a microporous film on the fabric. This kind of coating adhesive uses wet coating to treat fabrics with good breathability and moisture permeability. Compared with dry coating, wet coating is more complicated, so it is imperative to develop fabric coating adhesives that are both dry coating and waterproof and breathable. Our country developed such products such as PP-3 in the mid-1980s, which are made of acrylic monomer emulsion polymerization. <\/p>\n
\n <\/p<\/p>\n
\n 1.3 Multifunctional coating finishing agent<\/p<\/p>\n
\n \t\u76ee\u524d\uff0c\u805a\u4e19\u70ef\u9178\u916f\u6d82\u5c42\u80f6\u5df2\u4ece\u8fc7\u53bb\u7684\u9632\u6c34\u900f\u6e7f\u578b\u4ea7\u54c1\u53d1\u5c55\u5230\u591a\u4e2a\u54c1\u79cd\uff0c\u4e3b\u8981\u5305\u62ec\u963b\u71c3\uff0c\u9632\u98ce\uff0c\u906e\u9633\u53ca\u6ce1\u6cab\u6d82\u5c42\u6574\u7406\u5242\uff0c\u751a\u81f3\u8fd8\u517c\u6709\u51e0\u79cd\u6027\u80fd\u7684\u591a\u529f\u80fd\u4ea7\u54c1\u3002\u5176\u4e2d\u53c8\u4ee5\u963b\u71c3\u6d82\u5c42\u80f6\u53d1\u5c55\u5feb\u3002\u7814\u5236\u5f00\u53d1\u963b\u71c3\u6d82\u5c42\u5242\u4e3b\u8981\u6709\u4e24\u79cd\u9014\u5f84\uff0c\u4e00\u79cd\u662f\u9009\u7528\u963b\u71c3\u6027\u5355\u4f53\u5171\u805a\uff1b\u53e6\u4e00\u79cd\u662f\u5728\u805a\u4e19\u70ef\u9178\u916f\u4e73\u6db2\u4e2d\u6dfb\u52a0\u963b\u71c3\u534f\u6548\u5242\u548c\u963b\u71c3\u5242\u3002<\/p>\n
\n <\/p<\/p>\n
\n 2. Polyurethane coating glue (Polyurethane referred to as PU)<\/p<\/p>\n
\n The full name of polyurethane is polyurethane. It is a polymer compound containing -NHCOO- unit in its molecular structure. This unit is formed by the reaction of isocyanate group and hydroxyl group. The reaction formula is as follows: <\/p<\/p>\n
\n \u2014N=C=O+HO\u02c9\u2192\u2014NH-COO\u02c9<\/p<\/p>\n
\n \t20\u4e16\u7eaa70\u5e74\u4ee3\uff0c\u5fb7\u56fd\u9996\u5148\u5408\u6210\u4e86PU\u3002\u57281950\u5e74\u524d\u540e\uff0cPU\u4f5c\u4e3a\u7eba\u7ec7\u6574\u7406\u5242\u5728\u6b27\u6d32\u51fa\u73b0\uff0c\u4f46\u5927\u591a\u4e3a\u6eb6\u5242\u578b\u4ea7\u54c1\u7528\u4e8e\u5e72\u5f0f\u6d82\u5c42\u6574\u7406\u300220\u4e16\u7eaa60\u5e74\u4ee3\uff0c\u7531\u4e8e\u4eba\u4eec\u73af\u4fdd\u610f\u8bc6\u7684\u589e\u5f3a\u548c\u653f\u5e9c\u73af\u4fdd\u6cd5\u89c4\u7684\u51fa\u53f0\uff0c\u6c34\u7cfbPU\u6d82\u5c42\u5e94\u8fd0\u800c\u751f\u300270\u5e74\u4ee3\u4ee5\u540e\uff0c\u6c34\u7cfbPU\u6d82\u5c42\u8fc5\u901f\u53d1\u5c55\uff0cPU\u6d82\u5c42\u7ec7\u7269\u5df2\u5e7f\u6cdb\u5e94\u7528\u300280\u5e74\u4ee3\u4ee5\u6765\uff0cPU\u7684\u7814\u7a76\u548c\u5e94\u7528\u6280\u672f\u51fa\u73b0\u4e86\u7a81\u7834\u6027\u8fdb\u5c55\u3002\u4e0e\u56fd\u5916\u76f8\u6bd4\uff0c\u56fd\u5185\u5173\u4e8ePU\u7eba\u7ec7\u54c1\u6574\u7406\u5242\u7684\u7814\u7a76\u8f83\u665a\u3002<\/p>\n
\n Polyurethane coating agent is the main type of development today. Its advantages are: <\/p<\/p>\n
\n a. The coating is soft and elastic; <\/p<\/p>\n
\n b. The coating has good strength and can be used for very thin coatings; <\/p<\/p>\n
\n c. The coating is porous and has moisture permeability and ventilation properties; <\/p<\/p>\n
\n \td\u3001\u8010\u78e8\uff0c\u8010\u6e7f\uff0c\u8010\u5e72\u6d17\u3002<\/p>\n
\n Its shortcomings are: <\/p<\/p>\n
\n a. The cost is higher; <\/p<\/p>\n
\n b. Poor weather resistance; <\/p<\/p>\n
\n \tc\u3001\u9047\u6c34\u3001\u70ed\u3001\u78b1\u8981\u6c34\u89e3\u3002<\/p>\n
\n \tPU\u6d82\u5c42\u5242\u6309\u7ec4\u6210\u5206\u7c7b\u6709\uff1a\u805a\u916f\u7cfb\u805a\u6c28\u916f\uff1b\u805a\u919a\u7cfb\u805a\u6c28\u916f\uff1b\u82b3\u9999\u65cf\u5f02\u6c30\u9178\u916f\u7cfb\u805a\u6c28\u916f\uff1b\u8102\u80aa\u65cf\u5f02\u6c30\u9178\u916f\u7cfb\u805a\u6c28\u916f\u3002\u6309\u4f7f\u7528\u4e0a\u91c7\u7528\u7684\u4ecb\u8d28\u5206\u4e3a\u6eb6\u5242\u7c7b\u548c\u6c34\u7cfb\u7c7b\u3002<\/p>\n
\n <\/p<\/p>\n
\n 2.1 Solvent-based PU coating glue<\/p<\/p>\n
\n \t\u6eb6\u5242\u7c7bPU\u5177\u6709\u826f\u597d\u7684\u5f3a\u4f38\u5ea6\u548c\u8010\u6c34\u6027\uff0c\u4f46\u6bd2\u6027\u5927\uff0c\u6613\u71c3\u70e7\u3002\u4ece\u7ec4\u5206\u4e0a\u6765\u8bf4\uff0c\u5b83\u8fd8\u5206\u4e3a\u53cc\u7ec4\u5206\u7c7b\u548c\u5355\u7ec4\u5206\u7c7b\u3002\u53cc\u7ec4\u5206\u4ea7\u54c1\u7531\u9884\u805a\u7269\u548c\u4ea4\u8054\u5242\u7ec4\u6210\uff0c\u9884\u805a\u7269\u662f\u5c06\u5f02\u6c30\u9178\u916f\u4e0e\u4f4e\u805a\u591a\u5143\u9187\u53cd\u5e94\u751f\u6210\u7684\u672b\u7aef\u4e3a\u7f9f\u57fa\u7684\u9884\u805a\u7269\u3002\u4ea4\u8054\u5242\u5219\u662f\u542b\u6709\u591a\u4e2a\uff08\u4e09\u4e2a\u4ee5\u4e0a\uff09\u5f02\u6c30\u9178\u916f\u57fa\u7684\u5316\u5408\u7269\u3002\u5728\u6d82\u5c42\u6574\u7406\u65f6\uff0c\u9884\u805a\u7269\u4e0e\u4ea4\u8054\u5242\u53cd\u5e94\uff0c\u5f62\u6210\u70ed\u56fa\u6027\u7f51\u72b6\u8584\u819c\uff0c\u8d4b\u4e88\u7eba\u7ec7\u54c1\u4f18\u826f\u7684\u6027\u80fd\u3002\u4e3a\u4e86\u8fbe\u5230\u9632\u6c34\u900f\u6e7f\u7684\u6548\u679c\uff0c\u6eb6\u5242\u578b\u6d82\u5c42\u6574\u7406\u5242\u4e00\u822c\u91c7\u7528\u6e7f\u6cd5\u6d82\u5c42\u5de5\u827a\u52a0\u5de5\u7ec7\u7269\u3002<\/p>\n
\n <\/p<\/p>\n
\n 2.2 Water-based PU coating glue<\/p<\/p>\n
\n \t\u6c34\u7cfb\u578b\u53c8\u5206\u4e3a\u6c34\u6eb6\u6027\u548c\u6c34\u5206\u6563\u578b\u4e24\u79cd\u3002\u6c34\u7cfbPU\u7528\u4e8e\u7ec7\u7269\u6d82\u5c42\u6574\u7406\uff0c\u91cf\u5927\u9762\u5e7f\u3002\u6c34\u7cfbPU\u6210\u819c\u6027\u597d\uff0c\u5e76\u6709\u8f83\u597d\u7684\u9632\u6c34\u6027\u3002<\/p>\n
\n \t\u6c34\u7cfbPU\u6d82\u5c42\u80f6\u521d\u91c7\u7528\u8f6c\u76f8\u4e73\u5316\u6cd5\u5236\u9020\uff0c\u4f46\u4ea7\u54c1\u4e2d\u542b\u6709\u4e73\u5316\u5242\uff0c\u5bf9\u7c98\u7740\u6027\u3001\u5f3a\u97e7\u6027\u548c\u8010\u6c34\u6027\u4ea7\u751f\u4e0d\u826f\u5f71\u54cd\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c20\u4e16\u7eaa80\u5e74\u4ee3\u540e\u671f\uff0c\u81ea\u4e73\u5316\u578b\u6c34\u7cfb\u6d82\u5c42\u80f6\u9010\u6e10\u589e\u591a\uff0c\u5176\u4e3b\u8981\u539f\u7406\u662f\u5728\u805a\u5408\u7269\u94fe\u4e0a\u5f15\u5165\u9002\u91cf\u7684\u4eb2\u6c34\u57fa\u56e2\uff0c\u5728\u4e00\u5b9a\u6761\u4ef6\u4e0b\u81ea\u53d1\u5206\u6563\u5f62\u6210\u4e73\u6db2\u3002\u6c34\u7cfbPU\u6d82\u5c42\u80f6\u901a\u5e38\u7528\u4e8e\u5e72\u6cd5\u6d82\u5c42\u3002\u4e3a\u63d0\u9ad8\u6d82\u5c42\u4ea7\u54c1\u7684\u8010\u6c34\u6027\u3001\u67d4\u8f6f\u6027\u548c\u8010\u4e45\u6027\uff0c\u5e94\u8fdb\u884c\u524d\u3001\u540e\u9632\u6c34\u6574\u7406\u3002<\/p>\n
\n \tPU\u5927\u5206\u5b50\u4e2d\u542b\u6709\u5927\u91cf\u7684\u6781\u6027\u57fa\u56e2\uff0c\u5206\u5b50\u95f4\u529b\u5f88\u5f3a\uff0c\u5bfc\u81f4\u5176\u5177\u6709\u4f18\u826f\u6210\u819c\u6027\uff0c\u80fd\u591f\u5728\u7ec7\u7269\u4e0a\u5f62\u6210\u575a\u97e7\u800c\u8010\u4e45\u7684\u8584\u819c\uff0c\u62d2\u6c34\u6027\u826f\u597d\uff0c\u5b83\u8fd8\u5177\u6709\u4e00\u5b9a\u900f\u6e7f\u6027\ufffd The reason is: on the one hand, the polar groups or hydrophilic groups in PU, such as -OH, -NHCOO-, -SO3H, -COOH, etc., act as “chemical step stones” to cause water vapor molecules to flow from high to high along the steps. The humidity side migrates to the low humidity side; on the other hand, PU is composed of soft segments and hard segments, forming amorphous regions and crystallized regions in the structure respectively. Since the molecular chains in the amorphous region are relatively loose and the structure is not tight, water moleculesIt is easy to enter, migrate and spread, thereby achieving the purpose of moisture permeability. <\/p>\n
\n <\/p<\/p>\n
\n 2.3PU emulsion modification<\/p<\/p>\n
\n \t\u4e3a\u4e86\u63d0\u9ad8\u4e73\u6db2\u53ca\u819c\u6027\u80fd\uff0c\u6269\u5927\u5e94\u7528\u8303\u56f4\uff0c\u9700\u8981\u5bf9PU\u4e73\u6db2\u8fdb\u884c\u9002\u5f53\u7684\u6539\u6027\u3002\u76ee\u524d\uff0c\u6539\u6027\u7684\u9014\u5f84\u5927\u81f4\u53ef\u5206\u4e3a\u56db\u7c7b\uff1a\u2474\u6539\u8fdb\u5355\u4f53\u548c\u5408\u6210\u5de5\u827a\uff1b\u2475\u6dfb\u52a0\u52a9\u5242\uff1b\u2476\u5b9e\u65bd\u4ea4\u8054\uff1b\u2477\u4f18\u5316\u590d\u5408[10]\u3002\u5176\u4e2d\u5c24\u4ee5\u590d\u5408\u4e73\u6db2\u7684\u7814\u7a76\u4e3a\u6d3b\u8dc3\u3002<\/p>\n
\n <\/p<\/p>\n
\n 3. Silicone (polysiloxane) coating glue<\/p<\/p>\n
\n \t20\u4e16\u7eaa70\u5e74\u4ee3\uff0c\u6709\u673a\u7845\u7c7b\u6d82\u5c42\u6574\u7406\u5242\u5f00\u59cb\u53d1\u5c55\u3002<\/p>\n
\n \t\u805a\u7845\u6c27\u70f7\u7c7b\u5316\u5408\u7269\u7684\u4e3b\u94fe\u7531\u7845\u6c27\u952e\u8fde\u63a5\u800c\u6210\uff0c\u800c\u7845\u539f\u5b50\u4e0a\u53c8\u63a5\u6709\u70f7\u57fa\uff0c\u82ef\u57fa\u7b49\u6784\u6210\u7684\u4fa7\u94fe\uff0c\u6545\u5176\u5177\u6709\u534a\u65e0\u673a\u534a\u6709\u673a\u7684\u9ad8\u5206\u5b50\u7ed3\u6784\u3002\u6784\u6210\u805a\u7845\u6c27\u70f7\u4e3b\u94fe\u7684Si\u2014O\u2014Si\u94fe\u7684\u952e\u89d2\u8f83\u5927\uff0c\u539f\u5b50\u4e0e\u539f\u5b50\u4e4b\u95f4\u7684\u8ddd\u79bb\u8f83\u957f\uff0c\u5177\u6709\u8f83\u5927\u7684\u81ea\u7531\u5ea6\u3002\u6b64\u5916\uff0cSi\u2014O\u952e\u957f\u8fbe0.193nm\uff0c\u8fd9\u6837\u4f7f\u5f97\u805a\u4e8c\u7532\u57fa\u7845\u6c27\u70f7\u7c7b\u4e3a\u4ee3\u8868\u7684\u805a\u7845\u6c27\u70f7\u7c7b\u5316\u5408\u7269\u4e0d\u6613\u53d1\u751f\u7ed3\u6676\u5316\u3002\u56e0\u6b64\uff0c\u5176\u5bb9\u6613\u900f\u8fc7\u6c27\u6c14\uff0c\u6c2e\u6c14\u751a\u81f3\u6c34\u84b8\u6c14\u5206\u5b50\uff0c\u7528\u5176\u5904\u7406\u540e\u7684\u7ec7\u7269\u5177\u6709\u826f\u597d\u7684\u901a\u6c14\u900f\u6e7f\u6027\u3002<\/p>\n
\n In recent years, there has also been research on polysiloxane coating agents in China. Polysiloxane coating agents and polyurethane coating agents are mixed in a certain proportion and then coated on fabrics to achieve satisfactory waterproofing. Moisture permeability effect \ufffd\u5176\u4f5c\u7528\u673a\u7406\u662f\uff1a\u9632\u6c34\u6027\u53d6\u51b3\u4e8e\u6d82\u5c42\u8fde\u7eed\u539a\u819c\u548c\u805a\u7845\u6c27\u70f7\u7684\u62d2\u6c34\u4f5c\u7528\ufffd \ufffd\u800c\u900f\u6e7f\u6027\u80fd\u5219\u4f9d\u8d56\u4e8e\u805a\u7845\u6c27\u70f7\u826f\u597d\u7684\u900f\u6c14\u6027\u548c\u805a\u6c28\u916f\u5206\u5b50\u4e2d\u4eb2\u6c34\u57fa\u56e2\u7684\u201c\u5316\u5b66\u9636\u68af\u77f3\u201d\u4f5c\u7528\uff0c\u901a\u8fc7\u5438\u9644\uff0d\u6269\u6563\uff0d\u89e3\u5438\u65b9\u5f0f\u8fdb\u884c\u4f20\u6e7f\ufffd \ufffd<\/p<\/p>\n
\n \t\u6709\u673a\u7845\u7c7b\u6d82\u5c42\u6574\u7406\u5242\u4e3b\u8981\u7531\u5177\u6709\u6d3b\u6027\u57fa\u56e2\u7684\u805a\u7845\u6c27\u70f7\u5f39\u6027\u4f53\u7ec4\u6210\uff0c\u5728\u91d1\u5c5e\u76d0\u6216\u6709\u673a\u9178\u76d0\u7684\u4f5c\u7528\u4e0b\u53ef\u4ee5\u8fdb\u884c\u4ea4\u8054\u53cd\u5e94\ufffd \ufffd\u91c7\u7528\u4e0d\u540c\u7684\u805a\u7845\u6c27\u70f7\u5f39\u6027\u4f53\u548c\u4e0d\u540c\u7684\u50ac\u5316\u5242\u80fd\u4f7f\u6d82\u5c42\u7eba\u7ec7\u54c1\u5177\u6709\u4e0d\u540c\u7684\u6027\u80fd\u548c\u98ce\u683c\ufffd Mixing silicone elastomers with other coating polymers can improve the feel, breathability and wear resistance of other coating glues. Mixing silicone elastomers with other coating glues is the development direction of coating processing. , many scientific and technological workers focus on research in this field \ufffd<\/p<\/p>\n
Extended reading: https:\/\/www.china-fire-retardant.com\/post\/9393 .html<\/a> In-depth analysis of waterproof coating glue<\/p There are many ways to classify waterproof coating glue. The main categories according to chemical structure are: <\/p 1. Polya…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[46],"class_list":["post-8375","post","type-post","status-publish","format-standard","hentry","category-textile-fabric-news","tag-db"],"_links":{"self":[{"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=\/wp\/v2\/posts\/8375","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8375"}],"version-history":[{"count":0,"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=\/wp\/v2\/posts\/8375\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8375"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8375"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.textile-fabric.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8375"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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